非均匀热气体红外辐射特性计算与仿真  

Calculation and simulation of infrared radiation characteristics of non-uniform hot gas

作　　者：陈卫[1,2] 汪中贤[1,2] 马东辉[1,2] 樊祥[1,2] 邓潘[1,2] 

机构地区：[1]脉冲功率激光技术国家重点实验室,安徽合肥230037 [2]解放军电子工程学院光电系,安徽合肥230037

出　　处：《红外与激光工程》2010年第1期17-21,共5页Infrared and Laser Engineering

摘　　要：非均匀热气体由于内部空间点的温度、密度、组分及压力各不相同,其红外辐射特性的计算十分困难。为了计算非均匀热气体的红外辐射特性,首先从分析非均匀热气体特点和均匀热气体的谱带模型出发,以原子分子辐射理论为基础,结合谱线的碰撞展宽效应和多普勒展宽效应,利用单谱带模型Curtis-Godson(C-G)近似法对非均匀热气体谱带模型所用到的谱带模型参数进行了计算,提出一种计算非均匀热气体红外辐射特性的方法。最后,应用此方法计算了某单发动机喷气式飞机在非加力状态下尾焰3～5μm的红外辐射强度,计算结果与文献中给出的实际测量的尾焰红外辐射数据能较好地吻合,计算仿真结果验证了该方法的正确性。The calculation of infrared radiation characteristics of non-uniform hot gas is very difficult because its temperature,density,component and pressure are non-uniform for different points of inner space.To calculate the infrared characteristics for non-uniform hot gas,characteristics of non-uniform hot gas and line group model of uniform hot gas were analyzed firstly and based on radiation theory of molecules and atoms,the parameters of line group model of non-uniform hot gas were calculated with CG approximation for single spectrum model,combing the collided-broaden effects and the Doppler broaden effects of spectrum.Based on the anterior analysis,a new calculation method of infrared radiation characteristics of non-uniform hot gas was presented.Finally,the 3-5 μm infrared radiation intensity released from a simple spout jet aircraft at normal state was computed by using the calculation method mentioned above.The calculation result is preferably accord with the meterage data included in the thesis.The calculation and simulation results validate the correctness of the proposed method.

关 键 词：非均匀热气体 红外辐射特性 单谱带模型 C-G近似法 

分 类 号：TN219[电子电信—物理电子学]